Knob



FIG. 1 is a perspective view of a knob showing my new design;

FIG. 2 is an enlarged front view thereof;

FIG. 3 is an enlarged right side view thereof, the left side view beinga mirror image;

FIG. 4 is an enlarged bottom plan view thereof; and,

FIG. 5 is an enlarged rear view thereof. 

The ornamental design for a knob, as shown and described. 